85181113 has 2 divisors, whose sum is σ = 85181114. Its totient is φ = 85181112.

The previous prime is 85181093. The next prime is 85181119. The reversal of 85181113 is 31118158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74442384 + 10738729 = 8628^2 + 3277^2 .

It is a cyclic number.

It is not a de Polignac number, because 85181113 - 2⁵ = 85181081 is a prime.

It is not a weakly prime, because it can be changed into another prime (85181119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42590556 + 42590557.

It is an arithmetic number, because the mean of its divisors is an integer number (42590557).

Almost surely, 2^85181113 is an apocalyptic number.

It is an amenable number.

85181113 is a deficient number, since it is larger than the sum of its proper divisors (1).

85181113 is an equidigital number, since it uses as much as digits as its factorization.

85181113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 28.

The square root of 85181113 is about 9229.3614622031. The cubic root of 85181113 is about 439.9950292138.

The spelling of 85181113 in words is "eighty-five million, one hundred eighty-one thousand, one hundred thirteen".